Primary ignition system



Dec. 25, 1951 J, G' 2,579,928

PRIMARY IGNITION SYSTEM Filed June 28, 1948 2 1 IN VEN TOR.

ATTD RN EYB Patented Dec. 25, 1951 UNITED STATES PATENT OFFICE PRIMARYIGNITION SYSTEM Ernest Jacob Kangas, Duluth, Minn. Application June 28,1948, Serial No. 35,702

1 Claim. 1

This invention relates to ignition systems for internal combustionengines and more particularly to the distributor thereof.

It is an object of the present invention to provide a distributorarrangement for ignition systems wherein instead of having multiple camsand a single point there is provided a single cam and multiple pointswhereby to improve the life of the points of the distributor so thatthey will last many times the life of the single point and wherein thebreaker points can be adjusted from the outer side of the distributorbody thereby making the operation simple and without the need for aspecial tool.

Other objects of the present invention are to provide a dstributorhaving a single cam and multiple points with the points adjustable fromthe outer side of the distributor which is of simple construction, easyto adjust, inexpensive to manufacture and efiicient in operation.

For other objects and for a better understanding of the invention,reference may be had to the following detailed description taken inconnection with the accompanying drawing, in which:

Fig. 1 is an elvational view of the distributor embodying the featuresof the present invention.

Fig. 2 is an elevational view of the distributor with portions brokenaway to show the interior thereof, the distributor being broken awayalong line 2-2 of Fig. 1.

Fig. 3 is a transverse sectional view taken on line 33 of Fig. 1.

Fig. 4 is a fragmentary sectional view taken on line 4-4 of Fig. 3.

Figs. 5 and 6 are respectively sectional views taken respectively onlines 55 and 6-5 of Fig. 3.

Fig. 7 is a sectional view taken on line 'l'! of Fig. 6.

Referring now to the figures, 19 represents a driving shaft which isextended upwardly through a sleeve portion H and into a bottom casingl2. Fitted within the casing 12 is a. ball bearing unit l3 whichsupports for rotational movement, a casing part [4. The shaft It] has amember l5 coupled to its upper end onto which is removably fitted, a cam16, having a single indenture ll into which pivoted point arms l8 extendto close points L9. The arms l3 are pivotally connected upon upstandingpins 2| on a pin plate 22 which is insulatingly connected by screws 23and insulation 24 to the revolvable casing part [4. The arms are held onthe pins 21 by cotter pins 25. A spring 26 is anchored by a screw 21 tothe plate 22 and serves to maintain the pivot arm l8 upon the cam I6.

Stationary contact 3| is secured to the casing i 4 by screws 32. Theplate 22 has an angle member 33 secured thereto by a screw 34 and isconnected by a screw 35, Fig. 5, to conductors 36 upon being extendedthrough insulation 31 in the casing part I4. The terminal screw 35through one conductor 36 has a condenser 38 connected to it. Thecondenser is supported on a bracket 39 extending from the casing [4.

It should be apparent that by the single cam a plurality of points areoperated in succession. The stationary contacts 3| are adjustable alongthe inner face of the casing part 14. The fastening screw 32 extendsthrough a slot in the contact and may be loosened to permit theadjustment of the contact relative to the screw, Fig. 7. An adjustingscrew 4! is provided in the casing part [4 and has an eccentricformation 42 thereon engaging with an opening in the contact 3i so thatas the screw 4! is turned the contact will be adjusted. These adjustingscrews 4! are accessible from the exterior of the casing l4.Accordingly, the points may be adjusted outside of the distributor andwithout need for special tools.

Upon the part I4 there is fitted an insulating cap 44 having terminals45 circumferentially arranged about a central terminal 46 thereon. Theterminals 45 are consecutively connected with the terminal 46 through aterminal strip 41 on an insulating member 48 which is rotated by themember l6. The member 48 is tightly fitted onto a sprojection 49 on themember I 6. Spring clips 51 are pivotally secured as at 52 upon the partl4 and engage with the exterior of the insulating cap 44 and into adepression therein whereby to secure the cap 44 tightly upon the part[4.

While various changes may be made in the detail construction, it shallbe understood that such changes shall be within the spirit and scope ofthe present invention as defined by the appended claim.

I claim:

A distributor comprising a casing assembly having a lower casing part,an upper casing part and a ball bearing connection between the upper andlower parts to permit the adjustment of one part relative to the other,a cam disposed within the assembly and connected with a shaft extendinginto the assembly for the purpose of driving said cam, a platesurrounding the cam and in-- sulatingly connected to the upper casingpart, a plurality of circumferentially spaced point levers pivotallyconnected upon the plate and adapted tobear against the cam, said cambeing formed to operate the levers in succession, contact terminalshaving a slot and an opening therein which are spaced from each othermounted on the upper casing part adjacent each of the point levers, acontact on each of the point levers and the contact on each point leverengageable with a corresponding contact on the upper casing part uponeach lever being pivoted, a terminal extending from the plate and thecasing assembly,v a terminal cap mounted on the assembly, a bridgingmember engageable with terminals on the terminal cap and mounted on thecam for rotation within the cap, a screw mounted for rotation in theupper casing-part, an

eccentric head on the screw within the upper 15 1,452,419

casing part and said eccentric head being receivable in the opening inthe contact terminal in the upper casing part and the screw being ac-REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name I Date 926,698 Hubert June 29, 1909Eckermann Apr. 17, 1923 1,884,576 Comer Oct. 25, 1932 2,066,069 EhrlichDec. 29, 1936

